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김대식

Kim, Dai-Sik
Nano Optics Group
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Ultrafast dynamics of surface plasmon polaritons in plasmonic metamaterials

Author(s)
Ropers, C.Stibenz, G.Steinmeyer, G.Mueller, R.Park, D. J.Lee, K. G.Kihm, J. E.Kim, J.Park, Q. H.Kim, D. S.Lienau, C.
Issued Date
2006-07
DOI
10.1007/s00340-006-2191-4
URI
https://scholarworks.unist.ac.kr/handle/201301/54443
Fulltext
https://link.springer.com/article/10.1007%2Fs00340-006-2191-4
Citation
APPLIED PHYSICS B-LASERS AND OPTICS, v.84, no.1-2, pp.183 - 189
Abstract
Using near-field scanning optical microscopy and ultrafast laser spectroscopy, we study the linear optical properties of subwavelength nanoslit and nanohole arrays in metal films, which are prototype structures for novel plasmonic metamaterials. Near-field microscopy provides direct evidence for surface plasmon polariton (SPP) excitation and allows for spatial imaging of the corresponding SPP modes. By employing spectral interferometry with ultrashort 11-fs light pulses, we directly reconstruct the temporal structure of the electric field of these pulses as they are transmitted through the metallic nanostructures. The analysis of these data allows for a quantitative extraction of the plasmonic band structure and the radiative damping of the corresponding SPP modes. Clear evidence for plasmonic band gap formation is given. Our results reveal that the coherent coupling between different SPP modes can result in a pronounced suppression of radiative SPP damping, increasing the SPP lifetime from 30 fs to more than 200 fs. These findings are relevant for optimizing and manipulating the optical properties of novel nano-plasmonic devices.
Publisher
SPRINGER HEIDELBERG
ISSN
0946-2171
Keyword
EXTRAORDINARY OPTICAL-TRANSMISSIONLIGHTINTERFEROMETRYDIFFRACTIONEMISSIONARRAYSSHIFTS

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